Dear Kashif, if you have an aggregate of 50% in Physucs, Chemistry and Biology and you are from General Category, you are eligible for NEET. If you belong to SC,ST,OBC, you need 40% aggregate and for PWD it is 45%. This aggregate is only for Physics, Chemistry and Biology. If you meet this criteria and you will complete 17 years by December 31st or you are already 17 years, you are eligible for NEET no matter whether you cleared your 10+2 in First attempt or in Supplementary exams.